/* ==========================================
   CSS VARIABLES & RESET
   ========================================== */
:root {
    /* Primary Colors */
    --color-primary: #e2a74e;
    --color-primary-dark: #9e7231;
    --color-primary-light: #e6b771;
    
    /* Secondary Colors */
    --color-secondary: #0891b2;
    --color-accent: #f59e0b;
    --color-success: #10b981;
    --color-danger: #ef4444;
    --color-warning: #f59e0b;
    
    /* Neutrals */
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --font-sans: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'Courier New', Courier, monospace;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-image: url('./img/fondo-escencial.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
    color: var(--color-gray-800);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(2px);
    z-index: -1;
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */
.hidden {
    display: none !important;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--spacing-xl);
    border: 1px solid var(--color-gray-200);
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-2px);
}

/* ==========================================
   HEADER
   ========================================== */
.header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    padding: var(--spacing-xl) 0;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.header .logo {
    height: 90px;
    width: auto;
}

.header-title {
    font-size: 1.75rem;
    font-weight: 500;
    letter-spacing: -0.5px;
}

/* ==========================================
   MAIN CONTENT
   ========================================== */
.main-content {
    padding: var(--spacing-2xl) 0;
    min-height: calc(100vh - 200px);
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 3px solid var(--color-primary);
    display: inline-block;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

/* ==========================================
   SEARCH SECTION
   ========================================== */
.search-section {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
}

.search-controls {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-end;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.input-group.flex-grow {
    flex: 1;
}

.input-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-gray-700);
}

.input-field,
.input-select {
    padding: 0.75rem 1rem;
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-sans);
    transition: all var(--transition-fast);
    background: var(--color-white);
}

.input-field:focus,
.input-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.textarea {
    resize: vertical;
    min-height: 80px;
}

/* ==========================================
   BUTTONS
   ========================================== */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--color-gray-200);
    color: var(--color-gray-700);
}

.btn-secondary:hover {
    background: var(--color-gray-300);
}

.btn-success {
    background: linear-gradient(135deg, var(--color-success) 0%, #059669 100%);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* ==========================================
   AFFILIATE INFO
   ========================================== */
.info-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.status-badge {
    padding: 0.5rem 1rem;
    background: var(--color-success);
    color: var(--color-white);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 600;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.info-item {
    padding: var(--spacing-md);
    background: var(--color-gray-50);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
}

.info-item.highlight {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    border-left-color: var(--color-accent);
}

.info-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-xs);
}

.info-value {
    display: block;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-gray-900);
}

.info-value.amount {
    font-size: 1.5rem;
    color: var(--color-primary);
}

/* ==========================================
   BALANCE SUMMARY
   ========================================== */
.balance-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.balance-card {
    background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-white) 100%);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-gray-200);
    text-align: center;
    transition: all var(--transition-base);
}

.balance-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.balance-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.balance-amount {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    font-family: var(--font-mono);
}

.balance-amount.pending {
    color: var(--color-warning);
}

.balance-amount.movements {
    color: var(--color-secondary);
}

.balance-amount.final {
    color: var(--color-success);
}

/* ==========================================
   TRANSACTION PANEL
   ========================================== */
.transaction-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.btn-type {
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-gray-50) 100%);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.btn-type:hover {
    border-color: var(--color-primary);
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.btn-type.active {
    border-color: var(--color-primary);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
}

.type-icon {
    font-size: 2.5rem;
}

.type-text {
    font-size: 1rem;
    font-weight: 600;
}

/* ==========================================
   TRANSACTION FORM
   ========================================== */
.transaction-form {
    background: var(--color-gray-50);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-xl);
}

.form-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-primary);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-gray-700);
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    margin-top: var(--spacing-xl);
}

/* ==========================================
   INSTALLMENT PREVIEW
   ========================================== */
.installment-preview {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-xl);
    border: 2px solid var(--color-gray-200);
}

.installment-preview h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
}

.installment-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-height: 300px;
    overflow-y: auto;
}

.installment-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-gray-50);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

/* ==========================================
   MOVEMENTS TABLE
   ========================================== */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-gray-200);
}

.movements-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-white);
}

.movements-table thead {
    background: linear-gradient(135deg, var(--color-gray-800) 0%, var(--color-gray-900) 100%);
    color: var(--color-white);
}

.movements-table th {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    font-weight: 700;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.movements-table tbody tr {
    border-bottom: 1px solid var(--color-gray-200);
    transition: background-color var(--transition-fast);
}

.movements-table tbody tr:hover {
    background: var(--color-gray-50);
}

.movements-table tbody tr:last-child {
    border-bottom: none;
}

.movements-table td {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 0.9375rem;
}

.movements-table td.no-data {
    text-align: center;
    color: var(--color-gray-500);
    padding: var(--spacing-xl);
    font-style: italic;
}

.movements-table .amount-positive {
    color: var(--color-success);
    font-weight: 700;
}

.movements-table .amount-negative {
    color: var(--color-danger);
    font-weight: 700;
}

/* ==========================================
   LOADING OVERLAY
   ========================================== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    z-index: 9999;
    backdrop-filter: blur(4px);
}

.spinner {
    width: 60px;
    height: 60px;
    border: 6px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--color-white);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-overlay p {
    color: var(--color-white);
    font-size: 1.125rem;
    font-weight: 600;
}

/* ==========================================
   NOTIFICATION TOAST
   ========================================== */
.notification {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    background: var(--color-gray-900);
    color: var(--color-white);
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    font-weight: 600;
    z-index: 9999;
    animation: slideIn 0.3s ease-out;
    max-width: 400px;
}

.notification.success {
    background: var(--color-success);
}

.notification.error {
    background: var(--color-danger);
}

.notification.warning {
    background: var(--color-warning);
}

@keyframes slideIn {
    from {
        transform: translateX(120%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ==========================================
   FOOTER
   ========================================== */
.footer {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-2xl);
    border-top: 4px solid var(--color-primary);
}

.footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.footer-logo {
    height: 70px;
    width: auto;
    opacity: 0.9;
}

.footer-text {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */
@media (max-width: 768px) {
    .header-title {
        font-size: 1.25rem;
    }

    .search-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .info-grid {
        grid-template-columns: 1fr;
    }

    .balance-summary {
        grid-template-columns: 1fr;
    }

    .transaction-types {
        grid-template-columns: 1fr;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .form-actions {
        flex-direction: column;
    }

    .section-header {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-md);
    }

    .movements-table {
        font-size: 0.875rem;
    }

    .movements-table th,
    .movements-table td {
        padding: var(--spacing-sm);
    }

    .notification {
        left: var(--spacing-md);
        right: var(--spacing-md);
        bottom: var(--spacing-md);
    }
}

/* ==========================================
   PRINT STYLES
   ========================================== */
@media print {
    body {
        background: white;
    }

    body::before {
        display: none;
    }

    .header,
    .footer,
    .search-section,
    .transaction-panel,
    .btn {
        display: none;
    }

    .card {
        box-shadow: none;
        break-inside: avoid;
    }
}